Stop-motion for twisting-machines



A. B. BELHUMEUR.

STOP MOTION FOR TWISTING MACHINES.

APPLlCATlON FILED OCTQZY, I920- Patented July 26, 1921.

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ALFREp-B LOSS IBELHUMEUR, or WOONSOGKET, arronn ISLAND.

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Specification of Letters Patent. I

A pplicationfilcd October 27,1920. Serial No. 420,006.

To allwhomitmay concern:

Be it known that I, ALFRED B. BEL- HUMEUR, a citizen of the UnitedStates, re-

siding at lVoonsocket, in the county of Providence and State of RhodeIsland, have in vented certain new and useful Improvements inStop-Motions for Twisting-Ma, chines, of which the following is aspecification.

This invention relates to twisting and has special reference to a stopmotion for twisting machines. The invention more part1 cu larly hasreference to a stop motion design to operate in connection with a pairof drawing rolls in such manner as to release the thread being drawnbetween said rolls 1n the event of breakage of the thread.

One important object of the inventlon is to provide an improved andsimplified construction of stop motion of the character described.

A second important object of the inven-. tion is to provide a device ofthis character wherein the rolls are separated, upon breakage of thethread, by an improved form of lifting mechanism.

A third important object of the 1nvention is to provide, in a liftingmechanlsm of this kind, a lifting member stamped and formed from asingle piece of sheet metal.

With the above and other objects in view the invention consists ingeneral of certain novel details of construction and combinations ofparts, as well as improvements in manufacture, hereinafter fullydescribed, illustrated in the accompanying drawings, and specificallyclaimed.

In the accompanying drawings like characters of reference indicate likeparts in the several views, and

Figure 1 is a side elevation of the improved stop mechanism as appliedto a palr.

of rolls.

Fig. 2 is a transverse section of a portion of the stop mechanismremoved from the rolls.

Fig. 3 is a plan view of the stop mechanism removed from the rolls.

In the embodiment of the invention herein illustrated there is shown aportion of a twisting machine of which one of the side frames isindicated at 10. Mounted to rotate between the side frames is a lowerroll 11 on top of which operates an upper roll 12 j ournaled forrotation in guides 13 which terminate in slotted forks 14 wherein thejournals 15"of said roll 12 are mounted. By this means the roll 12 canrotate when in contact with the roll 11 but the roll 12 can alsfi) lfllove upward out of contact with said ro At 16 is a guide eye or loopthrough which 1 passes the thread 17. Pivotally mounted on the journals15 is a lifting member which consists of a single piece of sheet metalhaving a, body portion 18 of substantially rectangular form beforebending, the body portion being bent in the form of an are as clearlyshown in Figssl and 2. Extending laterally from the blank from whichthis body portion is formed is a pair of cars 19 which in the completedarticle are bent down to lie on opposite sides of the roll 12 andreceive the roll journals 15. Between the ears 19 the blank is cut withslits to leave tongues bent to form tubes 20. alined with each otheralong the median line of the blank so that an arm 21 of wire may extendthrough these ears or sleeves and have its downwardly bent end 22 enteran opening 23 formed in the body 18 whereby the arm is rigidly connectedto the lifting member or lifter. On the lower end of this arm is an eye24 through which the thread 17 passes.

From inspection of Fig. 1 it will be seen that so long as the thread istaut the parts will be held in the position shown in full lines but,should the thread break and thereby be loosened, slackening of thethread will result in the weight of the part 18 causing the lifter torotate and engage the roll 11. Now since the roll 11 is moving in thedirection of the arrow in Fig. 1 the edge of the lifter which contactswith the roll will be drawn in and in consequence the roll 12 will beraised to the dotted line position thereby preventing further movementof the thread 17 while at the same time binding the thread to the roll11.

There has thus been provided a simple and eflicient device of the kinddescribed and for the purpose specified.

It is obvious that minor changes may be made in the form andconstruction of this invention without departing from the materialprinciples thereof. It is not therefore desired to confine the inventionto the exact form herein shown and described, but it is wished toinclude all such as come within the scope claimed.

Patented July 26, 1921.

is'claimed as'neW, is

' 1. In a machine of the kind described,

having a fixed lower roll and an upper r011 j ournaled for verticalmovement to and from the lower roll, a-lifting device for the upper rollconsistingiof an arcuate plate provided with inwardly extending earsjournaled on the upper roll, and an arm attached to said arcuate plateand provided with, an eye at its free end, said arm and. plate beingarranged to lie on opposite sides of said roll.

2. In a machine of the class described, the

combination 'witlra lower roll mounted for rotation on a fixed axle, anupper roll rotatablyumounted;aboveithe l0Wer1ro11 and arranged tomovevertically to and'from the lower roll, aliftefconsisting of anarcuate plate coverin a segment of the upper roll at one side t erectand having ears journaled on said upperroll, and an arm eX-Q tendingfrom said lifter on the opposite.

side of the upperroll and,terminating inan eye.

V ALFRED BLOSVS BELHUMEUR.

In testimony whereof I aflix mysi nature;

